How to Mint and Sell Your Nano Banana AI Art as an NFT: Step-by-Step Beginner Guide (2026)
Amir Arsalan Sharifi
How to Mint and Sell Your Nano Banana AI Art as an NFT: Step-by-Step Beginner Guide (2026)
- You need a crypto wallet (MetaMask for Ethereum/Polygon, Phantom for Solana), a small amount of crypto for gas fees, and your 4K image file in PNG format.
- Polygon and Base are the lowest-cost chains for minting AI art NFTs — gas fees under $1 vs $20–$100+ on Ethereum mainnet.
- OpenSea supports "lazy minting" on Polygon — you don't pay gas until your NFT actually sells.
- All major marketplaces require you to disclose AI-generated work in your listing — non-disclosure risks delisting.
- Set royalties at 5–10% on secondary sales for ongoing income from resales.
- Start with a fixed price of 0.01–0.05 ETH (or equivalent) while building your collection history.
You've created a piece of Nano Banana 4K art you're proud of. It's sitting in a folder on your desktop at 4K resolution, ready. The question is: how does it become an NFT on a marketplace where people can find it, collect it, and buy it?
The minting process sounds technical because it involves blockchains, wallets, and gas fees — but in practice, it's a series of straightforward steps. This guide walks through every one of them, from zero crypto knowledge to a live listing, in the order you actually need to do them.
Step 1: Choose Your Blockchain
Before you set up a wallet, decide which blockchain you'll mint on. This decision affects your gas fees, your potential audience, and which marketplaces you can list on. Here's the current landscape for AI art NFT creators:
| Blockchain | Gas Fee (Mint + List) | Wallet | Best For | Top Marketplace |
|---|---|---|---|---|
| Ethereum | $20–$100+ | MetaMask | High-value 1/1 art, prestige collections | OpenSea, SuperRare, Foundation |
| Polygon | $0.01–$1 | MetaMask | Beginners, high-volume collections | OpenSea (lazy mint) |
| Base | $0.01–$0.50 | MetaMask | Low-cost minting with Ethereum prestige | OpenSea, Zora |
| Tezos | $0.001–$0.01 | Temple / Kukai | Art collectors, eco-conscious buyers | Objkt, Tezos Foundation |
| Solana | $0.0001–$0.01 | Phantom | Speed, low cost, gaming/PFP collections | Magic Eden, Tensor |
Step 2: Set Up Your Crypto Wallet
Download MetaMask from metamask.io (browser extension for Chrome/Firefox, or mobile app). Create a new wallet. Write down your 12-word seed phrase and store it somewhere physically secure — not in a notes app, not in email. This phrase is the only way to recover your wallet. Set a strong password. Done.
Download Phantom from phantom.app. The setup process is identical — create wallet, back up seed phrase, set password. Phantom also supports Ethereum and Polygon, making it a versatile choice if you want one wallet for multiple chains.
Download Temple Wallet (browser extension) or Kukai. Same seed phrase backup process. Tezos uses XTZ as its native token.
Step 3: Fund Your Wallet with Crypto
You need the native token of your chosen blockchain to pay gas fees. Gas is the network fee charged for processing transactions (minting an NFT, listing it for sale, accepting an offer).
- For Polygon: Buy MATIC on Coinbase, Binance, or Kraken. Send it to your MetaMask wallet address. You need about $5–$10 to start.
- For Ethereum/Base: Buy ETH. Send to MetaMask. Have $30–$50 on hand initially to cover gas volatility.
- For Solana: Buy SOL. Send to your Phantom wallet address. $5 is more than sufficient for dozens of mints.
- For Tezos: Buy XTZ. $2–$5 covers many mints given Tezos's ultra-low fees.
Step 4: Prepare Your Nano Banana 4K File
Before you open any marketplace, make sure your image file is ready:
- Format: PNG is the standard for still image NFTs. It's lossless — no quality compression.
- Resolution: Your Nano Banana 4K output should already be at 4K (up to 4096px). Keep it. Buyers see the file they're purchasing.
- File size: Aim for 5–25MB. Most marketplaces accept up to 100MB, but larger files mean higher IPFS storage costs and slower load times.
- Filename: Name the file descriptively before uploading — "neon-cyberpunk-cityscape-001.png" rather than "output_3847.png".
- No watermarks: Remove any tool watermarks before minting. Watermarked NFTs look unprofessional and undermine buyer confidence.
Step 5: Mint on OpenSea (Polygon — Recommended for Beginners)
Go to opensea.io. Click the wallet icon (top right). Select MetaMask. Approve the connection in your MetaMask popup. You are now logged into OpenSea with your wallet identity.
Click your profile icon → My Collections → Create a Collection. Give it a name (your artist name or collection theme), a description (tell the story of what you're making), and upload a logo image (350×350px). Under "Blockchain," select Polygon. Save.
In your collection settings, find the "Creator Earnings" field. Enter your royalty percentage — between 5% and 10% is the current standard for AI art NFTs. This percentage is paid to you every time your NFT resells on OpenSea.
Inside your collection, click "Add Item." Upload your PNG file. Fill in: Name (descriptive, keyword-rich), Description (your narrative + AI disclosure + edition info), Properties (add traits like Style, Year, Tool: Nano Banana 4K, Edition: 1/1). Click Create. MetaMask will ask you to sign a transaction — this is free (no gas) on Polygon lazy minting. Your NFT now exists.
Open your new NFT. Click "Sell." Choose a price (Fixed Price or Timed Auction). Set your amount in ETH or MATIC. Set the duration (7 days is standard). Review the 2.5% OpenSea fee that will be deducted from your sale. Click "Complete Listing." Sign in MetaMask. Your NFT is live.
Step 6: Mint on Zora (Base Chain — Zero Marketplace Fee)
Zora is a strong second platform for creators who want to keep more of their revenue. Zora charges 0% marketplace fee — you keep 100% of primary sales (minus gas). It runs on Base, Ethereum's Layer 2, which means low gas costs with Ethereum's security.
Go to zora.co. Connect MetaMask (switch to Base network — Zora will prompt you automatically). Click "Create." Upload your image, fill in title and description, set your price. Click "Create collectible." Approve the gas transaction in MetaMask (typically $0.01–$0.50 on Base). Your NFT is live on Zora and visible on OpenSea via aggregation.
Step 7: Write an NFT Listing That Actually Sells
The listing is where most beginners leave money on the table. A weak title and blank description will not sell. Here's the structure that works:
Title Formula
[Descriptive Name] #[Edition Number] — [1/1 or X/X Edition]
Example: "Neon Citadel #1 — 1/1 Edition | Nano Banana 4K"
Description Formula
- Hook (1–2 sentences): What is the piece? What feeling or world does it evoke?
- Story (2–3 sentences): What inspired it? What makes this specific piece notable?
- AI Disclosure (required): "Generated using Nano Banana 4K (Google Gemini 3 Pro Image). Commercial licence applies."
- Technical details: File format, resolution, edition size.
- Unlockables (if any): "Collector receives the original 4K PNG file and access to the artist Discord."
Pricing Strategy for Beginners
- Start at 0.01–0.05 ETH (approximately $25–$150 at current rates) for your first pieces.
- Price higher for 1/1 editions vs. editions of 10 or 100.
- Research comparable listings: search your style on OpenSea and filter by "Recently Sold" to understand what the market pays.
- Your first few sales build your transaction history — a wallet with zero sales history commands lower prices than one with a track record.
Step 8: After You List — What Actually Drives Sales
Minting and listing gets you visible on the marketplace. It doesn't automatically get you buyers. Here's what moves the needle:
- Twitter/X and Warpcast: The NFT collector community is heavily concentrated here. Post your new pieces with the image, listing link, and #NFTart #AIart hashtags.
- Discord: Join NFT art communities (Foundation Discord, SuperRare Discord, chain-specific servers) and participate genuinely — not just as a promotion channel.
- Consistent output: Collectors follow artists, not one-off pieces. A new piece every week builds an audience over time.
- Engage with other collectors: Like, comment, and collect others' work. The NFT community responds well to reciprocal engagement.
Frequently Asked Questions
Do I need to pay anything before my first NFT sells?
If you use OpenSea with Polygon lazy minting, no — you pay nothing until a buyer purchases your NFT. The gas fee is paid at the point of sale, typically deducted from the proceeds. If you mint on Ethereum mainnet or use Zora on Base, you pay a small gas fee upfront (under $1 on Base, potentially $20–100+ on Ethereum).
What royalty percentage should I set?
5–10% is the current standard for AI art NFTs. 7.5% is a common middle ground. Set it too high (15%+) and buyers who intend to resell will avoid your work — it cuts their potential profit too deeply. Set it too low (1–2%) and you lose significant ongoing income. Royalties are set per collection, not per NFT, so choose carefully before minting your first piece in a collection.
Can I mint the same image on multiple marketplaces?
Technically yes, but you should not. Selling the same image as a "1/1 edition" on multiple platforms is considered fraudulent in the NFT community. It destroys collector trust and violates most marketplace terms. If you want to be on multiple platforms, list different pieces on each, or create explicit edition collections (e.g., "Edition of 10") that are consistent across platforms.
What happens if my NFT doesn't sell?
Most NFTs don't sell immediately — this is normal. Lower your price, update the description, or promote the listing more actively. You can also delist (cancel the listing) at any time without losing the NFT. On Polygon lazy minting, you've paid nothing, so there's no financial loss from an unlisted or unsold piece. Treat early listings as learning exercises in pricing and presentation.
Is my Nano Banana 4K AI art eligible to be sold as an NFT?
Yes — Google's commercial licensing terms for Nano Banana (Gemini image generation) permit commercial use of generated images, including selling them as NFTs, on paid tiers. Always verify you are on a paid plan (not a free trial) before minting for commercial sale. Keep a record of your tool subscription as proof of commercial licence in case a marketplace queries your listing.
Now You Know How to Mint — Choose Where to Sell
Different NFT marketplaces attract different collector types, charge different fees, and favour different styles. Read the full marketplace comparison before committing.
Best NFT Marketplaces for AI Art →
